Machine for making concrete blocks.



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CA S. DAVIDIAN.

MACHINE FOR MAKING CONCRETE BLOCKS.

APPLICATION FILED JUNE 30, 1915.

. Patented Dec. 5,1916.

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rsas co PNom-Llnw. WASHINCIU mmmmw C. S. DAVIDIAN. MACHINE FOR MAKING CONCRETE BLOCKS. APPLICATION FILED JUNE 30,1915.

1]; QUKWU Q Patented Dec. 5, 1916.

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CASPAR S. DAVIDIAN, F LAWRENCE, MASSACHUSETTS.

MACHINE FOR MAKING CONCRETE BLOCKS.

Y 0 all whom it may concern:

Be it known that I, CAsrAR S. DAVIDIAN, a citizen of the United States of America, and a resident of Lawrence, in the county of Essex and Commonwealth of Massachusetts, have invented certain new and usefulImprovements in Machines for Making Concrete Blocks, of which the following is a specification.

The present lnvention relates to machines for molding building blocks of concrete or some similar material and has for its object the provision of a machine of this class which will be veryeifective in operation although constructed in a comparatively simple manner with few operating parts.

One of the objects of the invention is to provide means whereby the blocks may be withdrawn from the mold without injury to the exposed ornamental faces of the block.

Another object of the invention is to locate the face plate of the mold at the bottom thereof immediately beneath the tamping devices so that when the latter are operated the material will be forced directly at saidfface plate and a more compact and better finished face of the block will result.

The invention consists in certain novel features of construction and arrangement of parts which will be fully understood by reference to the description of the drawings and to the claims hereinafter given.

Of the drawings: Figure 1 represents a plan of a machine embodying the principles of the present invention. Fig. 2 represents a front elevation of a portion of the same. Fig. 3 represents a side elevation of the same. Fig. 4 represents a horizontal section of a portion of the same. Fig. 5 represents a side elevation of a portion of the same with the face plate tipped into substantially vertical position, and Fig. 6 represents a sectional detail through a portion'of the mold.

Similar characters designate like parts throughout the several figures of the draw- Tn the drawings, 101O are two side frames connected by the girts 11. Each side frame 10 is providedat the rear thereof with an upwardly extending projection 12, to which is secured a vertical back plate 13. This back plate has pivoted at 14 to opposite ends thereof the end plates 15 normally positioned perpendicular to the back plate 18,

but adapted to be moved outwardly about the pivots 14 into theposition shown at the specification of Letters Patent.

Patented Bee. a. mic.

Application filed June 30, 1915. Serial No. 37,779.

left of Fig. 4 of the drawings. The front upper end of each of the end plates 15 is provlded with a projection 16. Supported upon the side frames 10 is a face plate 17 having a panel 18 in its upper face. This face plate 17 is pivoted at 19 to the side frames 10 and has upwardly extending lugs 20 at its forward end, said lugs being substantially perpendicular to the upper face of said plate 17. Theselugs 20 are adapted to position a removable pallet 21 the height of which is substantially the same as that of the vertical back plate 13 and the end plates 15. The opposite ends of the pallet 21 are reduced in height as at 22, these reduced ends projecting beneath the lugs 16 on the pivoted end plates 15. When the pallet 21 has been vertically positioned by means of the lugs 20 and the end plates 15 have been moved against the shoulders 23 on the opposite ends of said plate, a rectangular frame 24 is placed around the back plate 13, end plates 15, and pallet 21, thus forming a rectangular mold to receive the material from which a stone is to be formed. This rectangular frame 24; has corner members 25 which rest upon the upper edges of the mold formed by the back plate 13, end plates 15, and pallet 21, so that the walls of said rectangular frame extend upwardly above the upper edges of the mold as shown in Figs. 2 and 3 of the drawings. The material is placed within the mold, thus formed, and then tamped. by means of the separated tamping members 26 the upper ends of which bear against the laterally extending flanges 27 formed upon a reciprocating member 28, the opposite ends of which are provided with bearings through which extend the vertical rods 29 secured to brackets 30 fastened to the side frames 10. The upper ends of the rods 29 are connected by means of a tie 31 between which and the reciprocating member 28 are interposed springs 32. In tamping the material in the mold the operator seizes the member 28 and depresses it so that the separated tamping members 26 come into contact with the material and force it directly toward the face plate 17 and into the panel 18 formed therein. This movement of the tamping devices directly toward the face plate 17 insures a more compact and better finished face to the stone being formed.

when the material has been sufficiently tamped, a portion thereof will extend above the upper edges of the mold. The operator then seizes the rectangular frame 24 and lifts'it sufficiently to disengage it from the pallet 21 and permits it to move toward the rear of the machine, the lower edge of the formed upon the side frames 10. Each rod 99 7 no is provided with adjusting members 35 between which and the bracket Stis interposed a spring 86, this spring having suiticient tension tO WltlldIflfiV the rectangular I frame 2& from above the mold into the position shown in dotted lines at 37 in Fig. 3 of the drawings. The end plates 15 are then I moved outwardly about their-pivots 14 into the position sho'wn at the left of Fig. 4 of .the drawings. The operatorthen seizes the handle'88 secured to the face plate 17 and swings the face plate upwardly about its pivot 19 into a substantially vertical position. The forward ends of the side frames 10 are provided'with slightly inclined supporting faces 39 on which the pallet 21 is deposited at the completion of this swinging movement of the face plate 17.

' Owing to the inclination of the supporting portions 29 of the side frames 10 the stone just formed will be thrown slightly forward so that its panel will be separated removedfrom the depression 18 in the face plate 17. The pallet 21 is then lifted with the stone thereon and deposited in some suitableplace where it may become hardened and ready for-use. Each end plate 15 is provided with a depression 10 adapted to forma panel in the end of the stone when desired. In case it is desired that one endof'the stone should be perfectly flat without'a panel a filling block 41 is provided to "fit the depression to, this block being secured in position by a bolt 42 extending through said block and end plate 15 and having a'nut 13 threaded to its outer end. The back plate '13; is provided with a plus rality of sets ofprojections te extending slightly into the mold, each pairfof these projections being separated a distance equal to the spaces between the tamping members 26.

Thepallet 21 is provided with a plurality Hof similar projections 45 disposed directly means of bolts 1'? opposite to the sets of back plate 13. -W'hen it is desired to form smaller stones in the "mold, filling block 46 l are disposed in the depression 18 in the face plate 17 and secured in position by extending through the I faceplate 17 and 'having'nuts 48 threaded to the outer ends"thereof; The block 1G having been positioned in this manner a projections on the v the mold, two stones of half length may be formed, or there may be formed at a single operation a half length and two quarter lengths, or a half length, a quarter length,

and two eighth lengths.

It is also apparent that by providing additional projections 1445 to the vertical back plate 13 and the plate 21, other sizes may be formed if desired.

The machine is very simple in construction and'very effective in its operation, making it possible to form an artificial stone very quickly with very little labor on the part of the operator.

It is believed that the operation and many advantages of this invention will be fully understood from the foregoing description.

Having thus described my invention, I claim:

1. In a device of the class described, the combination of a frame having a vertical plate; end plates pivoted to the ends of said vertical plate; a face plate pivotally mounted upon said frame and provided with lugs perpendicular to the face thereof; a pallet adapted to be positioned by said lugs; a rectangular frame for retaining said vertical plate, end plates, and pallet in normal position to form a mold; brackets secured to the rear of said frame; rods secured to said rectangular frame and extending through said brackets; springs surrounding said rods; and adjustable members 011 said rods for regulating the tension of said springs.

2. A device of the class described, comprising a frame having a vertical plate, end walls pivoted to the ends of said vertical plate, a spaced plate pivotally mounted upon the said frame and provided with lugs perpendicular to the face thereof, a pallet adapted to be positioned by the said lugs, a rectangular frame for retaining said vortical plate, end plates and pallet in normal position to form a mold, and resilient automatic retracting means for the said frame when released, the path of movement of said frame being in the plane of the top edge of the mold.

3. A block molding machine comprising a frame having inclined supporting faces and a vertical plate, end plates pivoted to the said vertical plate, a face plate pivotally mounted upon the said frame adjacent said L:

faces and provided With perpendicular lugs, a pallet adapted to be positioned by said lugs and arranged upon said inclined faces when the mold is open, a rectangular frame for receiving said vertical plate, end plates and pallet in normal position to form a mold, and automatic means for moving said rectangular frame to the rear of the machine when disengaged from said plates and pallet.

4. A block molding machine comprising a frame having a vertical plate, end plates pivoted to the end of said vertical plate, a face plate pivotally mounted upon said frame and provided With lugs perpendicular to the face thereof, a pallet adapted to be positioned by the said lugs, a removable recfiopies of this patent may be obtained for tangular frame adapted to fit over the upper edges of said vertical plate, end plates and pallet to form a mold, interior corner members upon said rectangular frame seated upon said mold With the side and end Walls of the rectangular frame extending above the upper edges of said mold, and automatic shifting means for said rectangular frame when released from the mold.

Signed by me at 4 Post Ofiice Sq., Boston, Mass, this 24th day of June, 1915.

CASPAR S. DAVIDIAN.

Witnesses:

WALTER E. LOMBARD, NATHAN C. LOMBARD.

five cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

